Studies on photocatalytic degradation of crystal violet by Tu-codoped TiO2 thin film fixed bed photoreactors under visible irradiation using chemometric approaches

In this work, we used central composite designs (CCDs) to optimize and model the photocatalytic behaviourof crystal violet on Tu-codoped TiO2 thin film fixed bed photoreactor. The effective variables were pH, concentration ofcrystal violet (CV) dye, flow rate and reaction time. After obtaining the optimized values, the UV–visible spectra recordedduring dye photocatalytic degradation. Subsequently, the number of chemical compounds present in the reaction wasanalyzed using singular value decomposition (SVD) and evolving factor analysis (EFA), then a soft multivariate curveresolution with MCR-ALS was performed to achieve information about the spectral profiles of each compound. Finally,a combined hard and soft modelling technique was applied to determine the kinetic constants of distinct reactionsinvolved in the photocatalytic degradation process.

کلیدواژه ها:

TiO2 thin film ، Photocatalytic degradation ، central composite designs ، MCR-ALS ، Kineticstudying ،